Possible setup

I've got a node.js installation that should be ideal for playing with this stuff. A simple Wiki-like setup with NTriple content seems like a reasonable first app. - DannyAyers

While the affordance description RDF could appear anywhere, because this stuff is meant to be interactive then such data ideally needs to be easily available just-in-time in close proximity to the resource it describes. So I'm going to try the following:

Affordance data about e.g.

http://hyperdata.org/active/index

will be available at

http://hyperdata.org/active/index?

in JSON-LD format. (As far as I can tell the ? is legal and doesn't break anything, seems a reasonable place to put metadata about the resource without the ?).

MCA: Another option for accessing the affordance information associated w/ a URI is to use a protocol-level request on the same URI: